Lighting device for sewing machines



Feb. 26, 1924.' 4

B. EVLSHQFF LIGHTING DEVICE FORA SEWING MACHINES md aan. 25. 1922 WITNESSES l 67m Patented Feb. 2, 1924.

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BERNARD ELsHOEE, or ELIZABETH, NEW JERSEY, AssreNoBJ 'ro DIEEL ivraNuEac'runF ING cOMraNY, OE ELIZABETH, NEW JERSEY, A CORPORATION or NEW JERSEY.

LIGHTING DEVICE FOR SEWING MACHINES.

Application filed. January 23, '1922. Serial No. 531,026.

To all whom 'it may concern:

Be it known that I, BERNARD ELSHOFF, a citizen of the United States, residing at Elizabeth, in the county of Union and State 5 of New Jersey, have invented certain new and useful Improvements in Lighting Devices for Sewing Machines, following is a specification, reference being had therein to the accompanying drawings.v

Electric lighting devices for sewing machines, particularly when applied to machines operating at high speed, are subjected to a type of vibration which has a tendency to shorten the life of the lamp-filaments.

isV of small amplitude but is sometimes of a severe, sharp, or arl-ing character, in the nature of a rapid succession of hammer 1 blows. lVhile, by mounting the lighting de- 2O vice adjacent the bend of the sewing machine gooseneck, the destructive effect ofthis ,vibration on the lamp-filament is sufficiently reduced to permit the lattainment of a satisfactory life by lamp-bulbs having filaments of the more rugged types, such as carbon or the metallized filaments, it is an object of the, present invention to further reduce the vibration transmitted to the lamp-filament, or soften its character, in order that a satisfactory life may be attained by lamps having filaments of the more delicate types, such as tungsten filaments. l Y

Another object of the invention is to reduce the vibration of the lamp-filament in a sewing machine lighting device retaining the advantages of the constructions disclosed in the copending applicationsof Frederick Diehl, Serial No. 449,968, filed March `5, 1921, and Serial No. 453,786, filed March 19, 1921, among which advantages may be mentioned the ease with which the device may be applied to the machine; its effective illumination of the work; its neat and attractive appearance; the absence of objec- 45 tionable shadows on the work; the freedom from objectionable heat and glare and the freedom from interference with the dropping of the sewing machine head within the cavity ofthe usual drop-head cabinet, or with the placing over the machine of the covei` of the usual hand-carryingl case.

To the attainment of the ends in view, a

cushioning device is interposed between the v horizontally disposed lamp-socket, which carries the lampfbulb and reiector, and the of which the The vibration of the machine frame `nection between the lamp and its supportY .patent to Dosch et al., No. 1,311,114. The standard 2 and arm 3 constitute the goose- 'affords a sheath orsleeve 13 within which sewing machine gooseneclr. The cushioning device should be of compact or condensedform so that the lamp-socket may be sustained closely adjacent the point of connection of the device to the gooseneck. In the specific embodiment of the invention chosen for the purposes of the present disclosure, the cushioning device is in the form of a compact spring of coiled form. The supporting elementl adapted for attachment to the machine frame adjacent the bend of the gooseneck is in the form of a hollow elbow within which is secured a nipple to which vone end of the spring is connected. The

other end of the spring is connected toa nipple threaded into the lamp-socket. In the present instance the spring of itself is not depended upon to sustain the lamp horizontally. The elbow support is preferably extendedv to form an outer sleeve encasing the spring element and a fulcrum support preferably in the form of a cushioning ring of soft or yieldingmaterial, such as felt, is

.interposed between the socket nipple and outer sleeve. 50

In the'accompanying drawings, Fig. 1 is a plan View of a sewing machine embodying the invention and Fig. 2 is a vertical longitudinal section through the cushioning con- In the embodiment of the invention illustrated 1 represents the bed, 2 the standard and 3 the overhanging horizontal arm of a sewing machine of the type disclosed` in the neck at the free end of which is the head 4 for the usual needle and presser-bars 5 and 6, respectively. The machine is preferably equipped with a built-in motor 7 having its shaft 8 disposed transversely of and geared to the sewing machine main-shaft 9.

The gooseneck is formed adjacent its bend at the juncture of the standard 2 and arm 3 with an apertured boss 10 within which is secured one leg of a horizontal hollow elbow 11 which constitutes the support for the lighting device. The other leg of the elbow is formed with an enlarged opening 12 and is disposed a nipple 14 screwed into the elbow at the bottom of the opening 12.

Screwed onto the projecting yend of the nipple 14 is one end of the short coil spring 15 into .theother end of which isl screwed uc the .nipple 1,6 which enters and is secured to the'usual lamp-socket 17. Clamped on the nipple 16 between the socket 17 and the end "of the spring l15 is a fulcrum-support in the form of cushioning washers 18 of i'elt or the like which are interposed between the smaller metal washers 19. The fulcrum-supportrl permits a limited rocking movement of the lamp-socket and bulb-,the spring 15V cushioning such movement or giving it a yielding characten' The telt-washersr 1 8 also soften and damp the rocking movement or :oscillation of the vsocket 17 about'the point of'contact of such washers 18 'withthe sleeve 13. The conductor wires 20 Vpass 'through the sleeve 11, nipples'lll, 16, spring 15 vand :washers 18V to the socket 17 which carries the lamp-bulb'19 and hreflector 2O.`

It willl be observedthat by the means described the lamp is yieldingly supported by a compact cushioning' `connection with the 'sewing machine goosenecl; vadjacent-the bend Y Aot the latter and' is'not displaced from its lhorizontal position closely in`rear of andV alongside the horizontal armmemberf'of the gooseneck and between the needle-bar head and the vertical memberof the gooseneck.

Thus, the advantages flowing from the novel location of the lamp, 'disclosedfin said col v'jbrationgis'reduced'to the jvanisliing point by retaining the supporting connection with the pending applications, *are retained and visewingl machine iframe adj acentV the bend of "the'goosenecl vand by introducing `a lcushionirng or yielding connectionb'etween the 'Y damp-socket; and its support. -The light from the lampi fl9"-willgthus' fall obliquely uponV I the work from the operators' right and will n. avoids the vcasting ofpobjectionable ,shadows :Lupen-the worlcby `machine parts carried byV illuminate Vthat edge of the presser-foot relativel to' whichrthe edge of the work is customarilyguided K Y Thexdescribed Idisposition lof the light orhforming a 'part'y of the sewing machine br,acket-arm. The lamp will, not be sub-.

jectedtoy the pounding vibration of ,the sew- Ving machine asrthecushioning; device interposed I between the :lamp-socket' 17 and the sewing. machine ra-mewill absorb or soften the charactero'f such vibration, thus kpermiti ting the'attainment yof' Ia satisfactorylife by lampshaVing'ilaments of the moredelicate types, such asV tungsten. The compact form of the lcushioning' device is such that) it is not necessary `to space'the socket a material distance from.,thepointofsupport' 'of the de-.V` vice=on the Sewing. machine. frame, The fa- 5 ,vorableflocation ot the i lamp in' permanent '.WQikfig IQlfQ--l' With' the ".bracleta'rmand `vglritliiri.theivertical'planes 4 definedby the side andjendfiedges' ofy thesjewi'ng 'machine bed may.,ffhesibefremined @inwendig-hang a;

esta@siii-,socialisatie wah-zusampingofthe` head withil'fthefcavity' of the usual drop-head cabinet or with the placing 'ofthe cover of a hand-carrying case over the sewing head.

The lighting device may, of course, beap port adapted for attachment tothe gooseneck of asewing machine, a short horizontal spiral springconnected at one'end to said support, a lamp-socket and bulb connectedto the otherrend of said'spring and disposed horizontally, land a fulcrum supspring. p

"SQA lighting device comprising a support adapted for attachment to the gooseneck of a sewing machine, 'a short horizontal spiral spring connected at one end to` said support, atlamp-,socket and bulb connected ,port for' said lamp-socket adjacent said rtothe other end ofsaid spring and disposed horizontally, Yand a fulcrumV supporty of 'cushioning material for saidflamp-socket adjacent said spring. Y Y j 1. A lighting device comprising ay support adapted for attachmentnto the goose- *neckota sewing machine, a' spring connected at one end to said support, a lampsocl'zet and bulbconnected'to the other end of said' springl andV disposed horizontally, and'y ulcrnm means additional to Ysaid "spring and intermediate the lamp-socket and said support forfsustaining saidlampsocket4 and bulb horizontally.

'5. A lighting zdevice comprising a tubular elbow supportadapted for attachment to a 'sewing machine gooseneck .adjacentA the bend of the latten'a lamp-socket :and bulb disposed horizontally and fulcrumed to rock vertically on said elbow, and a yielding Vsupporting connection' for said lamp-socket additional to said fulcrum".`

6. A lighting deviceY comprising a tubular elbow support adaptedfor attachment t0 a sewing machine goosenecl adjacent the bendo the latter, a spiral' spring housed withinone leg of `said elbow and lanchored at one end ,to the'latter, a lamp-socket and bulb-disposed horizontally and connected to be' supported by said spring 'within-said elbow, 'and' 'ulcrum' Ameans cooperating-with saidspring v'within sai'difelbow, for sustaining said lamp-socket and bulb horizontally. f 7.' The combination with `a sewing# machine'trame' having abcdV and gooseiie'ck including 'a' standard land horizontal ann terminating in a head, together with the usual stitch-forming and feeding mechanisms, of a tubular elbow connected to the rear side of said gooseneck adjacent the bend of the latter, an electric lamp-socket and bulb disposed closely in rear of and substantially parallel to the horizontal arm member of the gooseneck and intermediate the standard and head, a spiral spring supporting connection between the elbow, and Julcrurn means cooperating with said spring and coacting with said elbow to sustain the lamp-socket and bulb horizontally.

In testimony whereof2 I have signed my 15 name to this specication.

BERNARD ELSHOFF.

lamp-socket and 10 

